I bought those cute pears at a local farmer's market then "googled" the name "seckel" to learn more about them. The following is what I learned online. I am yet to taste them. I will add my comment later on how sweet they actually are.
"In the case of the diminutive Seckel, this could not be more truthful. The smallest of all commercially grown pears, Seckels are also the sweetest. So sweet in fact, that the near bite-size morsels are sometimes called "sugar pears."
Seckels are tiny pears, with a chubby, round body, small neck, and short stem. Their skin is usually green, but frequently exhibits a dark maroon blush that sometimes covers the entire surface of the pear.
Because of their small size, Seckels can easily be overshadowed by the larger varieties. However, it's their size which makes them a perfect choice for certain uses:
Snack-sized Seckels added to lunch boxes or bags are appreciated, particularly by children who love their extremely sweet flavor.
Seckels are small enough to be canned whole. Jars of "baby-pear" Seckels are charming as gifts.
As a plate garnish, a small half Seckel pear is attractive."